Re: bug#23750: 25.0.95; bug in url-retrieve or json.el

[Eli Zaretskii]

> From: Dmitry Gutov <address@hidden>
> Date: Tue, 29 Nov 2016 13:05:39 +0200
> Cc: address@hidden
> 
> On 29.11.2016 13:03, Kentaro NAKAZAWA wrote:
> 
> > (let* ((content (encode-coding-string
> >                  "ほげ <- VALID utf-8 Japanese multibyte text"
> >                  'utf-8))
> >        (url "https://api.github.com/gists";)
> >        (url-request-method "POST")
> >        (url-request-data
> >         (json-encode
> >          `(("description" . "test")
> >            ("public" . false)
> >            ("files" . (("test.txt" . (("content" . ,content)))))))))
> >   (with-current-buffer (url-retrieve-synchronously url)
> >     (buffer-string)))
> 
> json-encode returns a multibyte string.

Any idea why?  Is it again that 'concat' misfeature, when one of the
strings is pure-ASCII, but happens to be multibyte?  Maybe we should
do something about that.

Thanks.